Rotary pump.



PATENTED DEC. 19, 1905.

C. NOBS.

ROTARY PUMP.

APPLICATION FILED FEB. 24. 1905.

5551 461 GU60 mu /a riff!!! Witmaoo 7; W QM c vwenboz r enrich.

CHARLES NOBS, OF NEWARK, NEW JERSEY.

ROTARY PUMP.

Specification of Letters Patent.

Patented Dec. 19, 1905.

Application filed February 24, 1905. Serial No. 247,078-

10 all whom, it may concern;

Be it known that I, CHARLES N OBS, a citizen of the United States of America, and a resident of Newark, county of Essex, and State of New Jersey, have invented certain new and useful Improvements in Rotary Pumps, of which the following is a specification;

This invention relates generally to rotary Pumps, and its particular features will appear as the specification proceeds.

The general object of my invention has been to produce a rotary pump having a positive double action which may be advantageously used as a suction and force pump.

I have further aimed in this invention to produce a valveless pump whose parts are as few and whose arrangement is as little complicated as possible.

While the immediate object in view has been to devise a pump for drawing and discharging liquid in small quantities at a time, it will of course be understood that the invention is not limited to this particular use.

The arrangement of the parts and their operation is such that the pump is readily adapted for use in air blowers or compressors, injectors, lubricators, &c.

The invention is broadly characterized as follows: In a cylinder into which lead inlet and outlet pipes is rotated a member which is adapted to receive the liquid from the inlet pipe and carry it by its rotation to the outletipe. In the member are provided means for forcibly drawing the liquid from the inletpipe andfor discharging it through the outletpipe. This action may take place simultane: ously. The spirit of my invention obviously covers other means than those shown, which would readily occur to mechanics skilled in the art. In the present instance to obtain a forcible suction from the inlet-pipe and a forcible discharge through the outlet-pipe I have formed a passage, preferably diametral in character, through the member rotating in the cylinder, and in this passage I have provided a double-ended piston and means adapted to thrust the piston so that it may act to draw the liquid from the inlet-pipe and to forcibly discharge it through the outlet-pipe. Of course the piston could be used for one of these purposes alonethat is, conditions might arise where it would be only necessary to exert suction through the inletpipe or where it would only be necessary to exert force in discharging the liquid through the outlet-pipe. Such adaptations would of course fall within the spirit of my invention; I have preferred to so arrange the passage and the operation of the piston that while one head thereof is operating to draw the liquid from the inlet-pipe the opposite head is simultaneously acting to forcibly discharge the liquid previously received in the passage during the rotation of the head through the outlet-pipe. The specific means by which I accomplish the thrust of the piston and various adaptations of this general idea will be pointed out later on.

I have shown my invention in the accom panying drawings in a referred form, reserving changes therein so 'ar as my claims allow. In the drawings I have indicated like parts by like characters of reference.

Figure 1 of the drawings is a front elevation of my pump. Fig. 2 is a cross-sectional view taken on line as x of Fig. 1. Fig. 3 is a view similar to Fig. 1, showing the pump at a different period of its rotation. Fig. 4 is a view similar to Figs, 1 and 2, showing a modification producing a more forcible pumping action. Fig. 5 is a view showing a modification consisting of a change in the relative size of the piston and inlet-pipe.

Into the cylinder 1 lead the inlet and outlet pipes 2 and 3, respectively. While these pipes may be led into the cylinder at any suitable point, I have here shown them led into the cylinder on the opposite sides. In the cylinder rotates a member 4, which may be called. a head and which is rotated by means of the shaft 5, which in turn receives its motion from the pulley 6. The head must be provided with pockets or some suit able receiving portion for receiving the liquid from the inlet-pipe and carrying it by ts rotation to the outlet-pipe. This may be done in various ways. I have here provided for such receiving portion in the head by constructin a passage 7, which extends diametricafiy through the head. To produce a forcible suction at the inlet and discharge at the outlet pipes, I provide in this passage a double-ended piston 8, whose length is less than that of the passage, so that a suitable pocket or receiving portion 9 may be formed at the inlet-pipe.

The thrust of the piston may be suitably accomplished-by providing pins 10 and 11, connected thereto and extending through slotted portions 12 of the head, so formed as to limit the thrust of the piston, and a cam- IIO disk 13, against which the pins act to thrust the piston. Roller-bearings 14 will preferably be provided for the ins where contact is made with the cam-dis i.

From an inspection of Figs. 1 and 2 it will be'seen that as the head rotates it carries with it the piston and that the pin 10 will come into contact with the cam-disk. As the head continues to rotate the action of this pin against the cam-disk will gradually thrust the piston downward until the high point of the cam is reached. Pin 1 1 is shown in this position where the piston will of course have reached the limit of its downward thrust. The pins thus alternately coming into contact with the cam as the head rotates impart to the piston successive thrusts in one direction without necessitating any reciprocal thrust of the piston itself in the opposite direction.

It is of course obvious that the cams may be variously formed, so that the thrust of the piston may take place at any predetermined period during the rotation of the head. If it be desired that the thrust of the piston should only take place as it crosses the inlet and outlet pipes, a cam 15, such as is shown in Fig. 4, may be used. This cam would give a very sudden and forcible thrust to the piston and would perhaps be preferable when the invention was to be used for an injector-as, for instance, of steam or of lubricators. In Figs. 1 and 3 the cam is timed to produce a more gradual thrust upon the piston, and as the thrust begins before the liquid in the receiving-pocket has an opportunity to escape through the outlet-pipe some means must be provided for relievin the pressure thereon. This means I have s own in the form of a groove 16, which is formed in the inner face of the cylinder and which leads to the outlet-pipe. The groove must be extended to such a point on the inner face of the cylinder that it acts to relieve the pressure on the liquid in the receiving portion of the head as soon asthe pin acts on the camdisk to thrust the piston, and thereby compress the liquid in the receiving portion. The arrangement of the groove and the forming of the cam may be changed to suit the purposes for which any particular pump is designed. On the opposite side of the inner face of the cylinder and preferably of the same length as the groove 16 I provide another groove 1'7, leading to the inlet-opening. If this second groove be of the same length as the other, it will be readily understood that the piston will act to draw the liquid from the inlet-pipe at the moment the cam begins to draw this head of the piston away from contact with the inner face of the cylinder. In Fig. 4 there is obviously a large portion of the rotary motion which is lost so far as any suction or discharge is concerned. By use of these grooves I am enabled to reduce this lost motion to a very great extent,

so that the piston acts to draw and discharge the li uid during a maximum portion of the perio' of rotation of the head.

In certain work for which my invention is adapted there will be back pressure exerted from the outlet pipe on the piston as it crosses the same. Means must be provided to hold the piston against this back pressure, and I have therefore provided a bearing 18, formed as a continuation ofthe cam and con centric with the cylinder, against which the pins 10 and 11 bear, so-that the piston is held against any back pressure until it has entirely crossed the outlet-pipe.

By increasing the-relative proportions of the cross-sectional areas of the passage and the inlet and outlet pipes a greater drawing or discharging force may of course be obtained. Such a modification is shown in- It will thus be seenthat I have produced a rotary pump provided with a piston which produces a forcible suction and discharge at itsopposite ends simultaneously and whose action to produce this suction and discharge can be utilized to the fullest extent. I have here shown only onepassage-and piston; but it is obvious that I am not limited to one and that other modifications and changes in the arrangement of parts may be made.

What I claim is 1. Ina device of the character set forth, a cylinder, inlet and outlet pipes opening into said cylinder, a rotatable member operating in said cylinder adapted to carry the fluid from the inlet to the outlet pipe, and having a portion adapted to receive the fluid from the inlet-pipe, means for rotating said member, and a passage extending diametrically through said member adapted to receive the fluid from theinlet-pipe, and means operatingin said passage adapted to simultaneously draw the fluid from the inlet-pipe into-one end of the passage and todischarge through thecoutlet from the other end of the passage the fluid previously received therein.

2. In a device of the character set forth, a cylinder, inlet and outlet pipes opening into said cylinder on opposite sides, a rotatable member in saidcylinder provided with a diametral passage extending therethrough, means for rotating said member, a piston carried by the member and operating in the passage, and means adapted to thrust the piston as it crosses the pipes to simultaneously produce a forcible suction and dis- IIO charge at the opposite ends of the piston at means for rotating said member, a piston sense carried by the member and operating in the passage, and means adapted to thrust the piston to simultaneously produce a forcible suction and discharge at the opposite ends of the piston at predetermined periods during the rotation of the member.

4. In a device of the character set forth, a cylinder, inlet and outlet pipes opening into said cylinder on opposite sides, a rotatable member in said cylinder provided with a diametral passage extending therethrough, means for rotating said member, a piston carried by-the member and operating in the passage, and means adapted to thrust the piston in the same direction as it crosses the pipes to simultaneously produce a forcible suction and discharge at the opposite ends of the piston at predetermined periods during the rotation of the member.

5. In a device of the character set forth, a cylinder, inlet and outlet pipes opening into said cylinder on opposite sides, a rotatable member in said cylinder provided with a diametral passage, extending therethrough, means for rotating said member, a piston carried by the member and operating in the passage, and means adapted to thrust the piston in the same direction to simultaneously produce a forcible suction and discharge at the opposite ends of the piston at predetermined periods during the rotation of the member.

6. In a device of the character set forth, a cylinder, inlet and outlet pipes opening into said cylinder on op osite sides, a rotatable member in said cy inder provided with a diametral passage extending therethrough, means for rotating said member, a piston carried by the member and operating in the passage, means adapted to thrust the piston to simultaneously produce a forcible suction and discharge at the opposite ends of the piston at predetermined periods during the rotation of the member, and means adapted to limit the thrust of the piston.

7. In a device of the character set forth, a cylinder, inlet and outlet pipes opening into said cylinder, a rotatable member in said cylinder provided with a passage extending therethrough, means for rotating said member, a piston carried by the member and operating in the passage, means adapted to thrust the piston in the same direction at predetermined periods during the rotation of the member, and means adapted to limit the thrust of the piston.

8. In a device of the character set forth, a cylinder, inlet and outlet pipes opening into said cylinder on opposite sides, a rotatable member in said cylinder provided with a diametral passage extending therethrough, means for rotating said member, a piston carried by the member and operating in the passage,'means adapted to thrust the piston as it crosses the pipes to simultaneously pro duce a forcible suction and discharge at the opposite ends of the piston at predetermined periods during the rotation of the member, and means adapted to hold the piston against back pressure from the outlet-pipe.

9. In a device of the character set forth, a cylinder,'inlet and outlet pipes opening into said cylinder on opposite sides, a rotatable member in said cylinder provided with a diametral passage extending therethrough, means for rotating said member, a piston carried by the member and operating in the passage, means adapted to thrust the piston to simultaneously produce a forcible suction and discharge at the opposite ends of the piston at predetermined periods during the rotation of the member, means adapted to limit the thrust of the piston, and means adapted to hold the piston against back pressure from the outlet-pipe.

10. In a device of the character set forth,

a cylinder, inlet and outlet pipes opening cylinder provided with a passage, means for rotating the head, a piston carried by the head and operating in the passage, a camdisk, pins connected to the piston and adapted to alternately act against the cam to thrust the piston in the same direction at pregeteirmined periods during the rotation of the 12. In a device of the character set forth, a cylinder, inlet and outlet pipes opening into said cylinder, a rotatable head in said cylinder provided with a passage of a crosssectional area greater than that of the pipes, means for rotating the head, a piston carried by the head and operating in the passage, a cam-disk, pins connected to the piston and adapted to alternately act against the cam to thrust the piston in the same direction at predetermined periods during the rotation of the head. 7 1

13. In a device of the character set forth, a cylinder, inlet and outlet pipes opening into said cylinder, a rotatable head in said cylinder provided with a passage, means for rotating the head, a piston carried by the head and operating in the passage, and arranged to cross the pipes during the rotation of the head, a cam-disk, pins connected to the piston and adapted to alternately act against the cam to thrust the piston in the same direction at "redetermined periods during the rotation o the head, the cam being so timed as to thrust the piston as it crosses the pipes to produce a forcible suction and discharge at opposite ends of the piston..

14. In a device of the character set forth, a cylinder, inlet and outlet pipes opening into said cylinder, a rotatable head in said cylinder provided with a passage of a crosssectional area greater than that of the pipes, means for rotating the head, a piston carried by the head and operating in the passage, and arranged to cross the pipes during the rotation of the head, a cam-disk, pins connected to the piston and adapted to alter- 'nately act against the cam to thrust the piston in the same direction at predetermined periods during the rotation of the head, the cam being so timed as to thrust the piston as it crosses the ipes to produce a forcible suction and disc arge at opposite .ends of the piston.

15. In a device of the character set forth, a cylinder, inlet and outlet pipes opening into said cylinder, a rotatable head in said cylinder provided with a passage, means for rotating the head, a piston carried by the head and operating in the passage, a camdisk, pins connected to the piston, passing through a slot in the head and adapted to alternately act against the cam to thrust the piston in the same direction at predetergingd periods during the rotation of the 16. In a device of the character set forth, a cylinder, inlet and outlet pipes, opening into said cylinder, a rotatable head in said cylinder provided with a passage, means for rotating the head, a piston carried by the head and operatin in the passage, a camdisk, pins connected to the piston and adapted to alternately act against the cam to thrust the piston in the same direction at predetermined periods during the rotation of the head, and means adapted to hold the piston against back pressure from the outlet-pipe.

17. In a device of the characterset forth, a cylinder, inlet and outlet pipes opening into said cylinder, a rotatable head in said cylinder provided with a passage ofa crosssectional area greater than that of the pipes, means for rotating the head, a piston carried by the head and operating in the passage, a cam-disk, pins connected to the piston and adapted to alternately act against the cam to thrust the piston in the same direction at predetermined periods during the rotation of the head, and means adapted to hold the piston against back pressure from the outlet- 1 e. p l8. In a device of the character set forth, a cylinder, inlet and outlet pipes opening into said cylinder, a rotatable head in said cylinder provided with a passage, means for rotating the head, a piston carried by the head and operating in the passage, and arranged to cross the pipes during the rotation of the head, a cam-disk, pins connected to the piston and adapted to alternately act against the cam to thrust the piston in the same direction at predetermined periods during the rotation of the, head, the cam being so timed as to thrust the piston as it crosses the pipes to produce a forcible suction and discharge at opposite ends of the piston, and

means adapte to hold the piston against back pressure from the outlet-pipe.

19. In a device of the character set forth, a cylinder, inlet and outlet pipes opening into said cylinder, a rotatable head in said cylinder provided with a passage of a crosssectional area greater than that of the pipes, means for rotating the head, a piston carried by the head and operating in the passa e, and arran ed to cross the pipes during 516 rotation o the head, a cam-disk, pins connected to the piston and adapted to alternately act against the cam to thrust the piston in the same direction at predetermined periods during the rotation of the head, the cam being so timed as to thrust the piston as it crosses the pipes to producea forcible suction and discharge at opposite ends. of the 7 piston, and means adapted to hold the piston against back pressure from the outlet-pipe.

20. In a' device of the character set forth, a cylinder, inlet and outlet pipes opening into said cylinder, a rotatable head in said cylinder provided with a passage, means-for rotating the head, a piston carriedby the head and operating in the passage, a camdisk, pins connected to the piston, passing through a slot in the head and adapted to alternately act against the cam to thrust the piston in the same direction at predeter- Ioo mined periods during the rotation of the head, and means adapted to hold the piston against back pressure from the outlet-pipe.

21. In a device of the character set forth, a cylinder, inlet and outlet pipes opening into said cylinder, a rotatable head in said cylinder provided with a passage, means for rotating the head, a piston carried by the head and operating in the passage adapted to form with the passage, and at the end of its thrust, a receiving-pocket in the head, means adapted to thrust each end of the piston alternately in one direction only at predetermined periods during the rotation of the head, and means adapted to relieve the pressure upon the liquid in the pocket as the thrust takes place. 7

22. In a device of the character set forth, a cylinder, inlet and outlet pipes opening into said cylinder, a groove formed in the inner face of the cylinder leading to the outletpipe, a rotatable head in said cylinder provided with a passage, means for rotating the head, a piston carried by the head and operating in the passage, a cam-disk, pins connected to the piston and adapted to alternately act against the cam-disk to thrust the piston in the same direction at predetermined periods during the rotation of the head, the cam being so timed as to begin the thrust when the discharge-head of the piston reaches the groove.

23. In a device of the character set forth, a cylinder, inlet and outlet pipes opening into said cylinder, a groove formed in the inner face of the cylinder leading to the inletpipe, a rotatable head in said cylinder pro vided with a passage, means for rotating the head, a piston carried by the head and operating in the passage, a cam-disk, pins connected to the piston adapted to alternately act against the cam-disk to thrust the piston in the same direction at predetermined periods during the rotation of the head, the cam being so timed as to begin the thrust when the receiving-head of the piston reaches the groove.

24. In a device of the character set forth, a cylinder, inlet and outlet pipes opening into said cylinder, grooves formed in the inner face of the cylinder leading to the said pipes, a rotatable head in said cylinder provided with a passage, means for rotating the head, a piston carried by the head and operating in the pas sage, a cam-disk, pins connected to the piston and adapted to alternately act against the cam to thrust the piston in the same direction at predetermined periods during the rotation of the head, the cam being so timed as to begin the thrust when the heads of the piston reach the grooves.

25. In a device of the character set forth, a cylinder, inlet and outlet pipes opening into said cylinder, grooves formed in the inner face of the cylinder and leading to the said pipes, a head rotating in said cylinder, means for rotating the head, a diametral passage through said head of a cross-sectional area greater than that of the inlet-pipe, a piston carried by the head and operating in said passage, a cam-disk, roller-pins connected to the piston and adapted to alternately act against the cam to thrust the piston in the same direction, the cam being so timed as to begin the thrust on the piston when the heads thereof reach the grooves.

26. In a device of the character set forth, a cylinder, inlet and outlet pipes opening into said cylinder, a head rotating in the cylinder, means for rotating the head, a passage through the head, a piston carried by the head and operating in said passage, a camdisk, pins connected to the piston and adapted to alternately act against the cam to thrust the piston in the same direction, and a bearing against which the pins bear after leaving the cam, adapted to hold the piston against back pressure from the outlet-pipe.

27. In a device of the character set forth, a cylinder, inlet and outlet pipes opening into said cylinder, a rotatable head in said cylinder provided with a passage, means for rotating the head, a piston carried by the head and operating in the passage, a member fixed in relation to said head and piston and adapted to thrust each end of the piston alternately in the same direction at predetermined periods during the rotation of the head.

28. In a device of the character set forth, a cylinder, inlet and outlet pipes opening into said cylinder, a rotatable head in the cylinder provided with a passage of a cross-sectional area greater than that of the inletpipe, means for rotating said head, a piston carried by the head and operating in the passage, a second member fixed in relation to said head and piston and adapted to thrust each end of the latter alternately in the same direction at predetermined periods during the rotation of the head.

29. In a device of the character set forth, a cylinder, inlet and outlet pipes opening into said cylinder, a rotatable head in said cylinder provided with a passage, means for rotating the head, a piston carried by the head operating in the passage, and means adapted to thrust each end of the piston alternately in the same direction at predetermined periods during the rotation of the head.

Signed at Newark, New Jersey, this 18th day of February, 1905.

CHARLES NOBS.

Witnesses:

RAYMOND C. SPAULDING, LOUISE O. MfILLER. 

